Asparagus or garden asparagus, scientific name Asparagus officinalis, is a spring vegetable, a flowering perennial plant species in the genus Asparagus.It was once classified in the lily family, like its Allium cousins, onions and garlic, but the Liliaceae have been split and the onion-like plants are now in the family Amaryllidaceae and asparagus in the Asparagaceae. Asparagus officinalis is native to most of Europe, northern Africa and western Asia,and is widely cultivated as a vegetable crop.